Renames precision to recall throughout the ANN-evaluation tutorial so
the page aligns with the ANN-benchmarks convention and with the new
Retrieval Quality Fundamentals page. The numerical formula is
unchanged: when ANN and exact search both return exactly k items,
recall@k and precision@k are numerically identical.
Other changes:
- Remove the Quality metrics subsection, now covered by the
Fundamentals page, and replace it with a short link across.
- Bump weight from 4 to 6 so the three retrieval-quality pages
order as Fundamentals, Golden Query Set, Evaluation.
- Fix a pre-existing prose/code mismatch: the prose said "first
50000 items" while the code uses range(60000).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
